Ink ribbon cassette



FIG. 1 is a perspective view of an ink ribbon cassette showing my newdesign;

FIG. 2 is a front elevational view;

FIG. 3 is a top plan view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a rear elevational view; and,

FIG. 7 is a bottom plan view thereof.

The ornamental design for an ink ribbon cassette, as shown.